One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,14,18,34)(4,20)(5,26)(6,11)(7,13)(8,17,35,19)(9,23)(10,28)(12,31)(15,32,21,36)(16,33,49,62)(22,53)(24,39)(25,38)(27,56)(29,41)(30,42)(37,55)(40,54)(43,51,59,46)(44,48,61,50)(45,64,52,60)(47,58,57,63)(1,3,7,18)(2,8)(4,21)(5,16,29,49)(6,17,31,19)(9,36,39,32)(10,33)(11,14)(12,34)(13,35)(15,25)(20,43,38,59)(22,52)(23,51)(24,46)(26,44)(27,57)(28,48,30,50)(37,63,53,58)(40,64,56,60)(41,61)(42,62)(45,55)(47,54)(1,4,6,23,7,25,31,24)(2,9,12,20,13,39,11,38)(3,15,17,46,18,21,19,51)(5,27,28,55,29,54,30,22)(8,32,34,59,35,36,14,43)(10,40,26,37,42,56,41,53)(16,47,48,52,49,57,50,45)(33,60,44,58,62,64,61,63)(1,5,7,29)(2,10,13,42)(3,16,18,49)(4,22,25,55)(6,30,31,28)(8,33,35,62)(9,37,39,53)(11,26,12,41)(14,44,34,61)(15,45,21,52)(17,50,19,48)(20,40,38,56)(23,54,24,27)(32,58,36,63)(43,64,59,60)(46,57,51,47)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.